/<template>
  <ul>
    <li :style="{opacity}">欢迎学习Vue</li>
    <li>news001<input type="text"></li>
    <li>news002<input type="text"></li>
    <li>news003<input type="text"></li>
  </ul>
</template>

<script>
export default {
  name:'MyNews',
  beforeDestroy(){
    console.log('MyNews组件即将被销毁了');
  },
  data(){
    return{
      opacity:1
    }
  },
  // mounted(){
  //   setInterval(()=>{
  //     console.log('@');
  //     this.opacity-=0.01
  //     if(this.opacity<=0){
  //       this.opacity=1
  //     }
  //   },16)
  // }
  activated(){
    this.a = setInterval(()=>{
      console.log('@');
      this.opacity-=0.01
      if(this.opacity<=0){
        this.opacity=1
      }
    },16)
  },
  deactivated(){
    clearInterval(this.a)
  }
}
</script>

<style>

</style>